Mercury vapor lamp



July 20, 1948. A. JJcosMETTo 25445313 MERCURY VAPOR LAMP Filed July 41'7, 194s- A T TRNEYS Patented July 20, 1948 MERCURY VAPOR LAMP Aristodeme J. Cosmetto, New York, N. Y. Application July 17:', 1946, Serial N0. 684,199

This invention relates tol holders for mercury vapor lamps and more particularly tol afwater cooling arrangement therefor. l

It is an object of the present inventionto provide a water-cooled holder arrangement for vapor s lamps in which the water passages are soshaped and disposed as to minimize, as far as possible, abrupt changes in the cross-section of the water flow, and thereby to eliminate eddy currents and air bubbles that tend to form in the cooling water.

It is another object of the `invention to provide a cooling arrangement for vapor lamps in which there are `no fragile glass-to-metal seals- It is still another object of the invention to provide a water-cooled vapor lamp arrangement which can be assembled or disassembled by the turning oi a single clamping member and wherein upon removal of this member the parts are free to be extracted by a simple pulling operation.

It is still another object of the invention to provide a holder and cooling jacket `for vapor lamps wherein the metallic parts at the dangerously high potentials are not exposed, and the current-carrying wires are hidden in and insulated by the rubber tubes conducting the Water.

It is still another object ofthe invention to provide a water-cooled vapor lamp in which all the elements are concentric to a single axis, thereby facilitating the mounting procedure and eliminating distortion which arises when glass elements as is the case where the elements are not concentric with the light source. f

It is still another object ofv the lnventlonto vprov-ide a water-cooled vapor lamp in which the 'glass elements are so shaped that they readilyy can be produced with the highaccuracy necessary to eliminate distortion. l

AccordingV to the inventionVthere is, provided a. main holder piece yhaving an enlargedrecess intowhich the various parts of the lampand the cooling arrangementV are fitted and intowhich arsingle screw cap is tightened to secure all of the parts to the holder. Projecting centrally from the bottom of the recess and in communication with an inlet cooling uid pipe.- is a terminal lamp support of spider cross-section having its end formed to receivel the contact terminal at one end of a vapor lamp. This spider shaped support serves as a conductor and cooling liquid passes upwardlylbetween spider projections for delivery to a transparent and insulating` sleeve and about the vapor lamp. At the end of the sleeve the patho! the cooling liquid reverses and moves down Wardly between the sleeve and an outside casing.' y

5 Claims. (Cl. 240- 11.4)

The liquid is received in an annular space near the bottom of the recess and conducted away from the holder through a discharge tube. The

contact terminal or clip for the outer end 'of the vapor lamp is seated in rubber in the outer end of the outer glass casing. The rubber cushion serves as a support and centering device fo the tube. at their inner ends are seated in rubber. Conducting wires are connected to the cooling fluid pipes which serve to feed current to the vapor lamp. A wire connection is made through the outer easing vfrom the terminal of the Vapor lamp at its outer end to the outlet cooling fluid tube or pipe. Preferably the holder is made of'plastic material but reinforced with metal parts'where wear surfaces are needed.

For other objects and for a better understanding of the invention, reference may be had to the following detailed description taken in 'connection with the accompanying drawing, in which Fig. 1 is a, cross-sectional view, in elevation, of the holder with the lamp secured in place therein;

Fig. 2 is a cross-sectional View showing a continuation of the lower end of the lamp shown in Fig. land illustrating the connection of the expansible conducting wires Within the cooling fluid tubes. Y

Fig. 3 is a detailed View of the vertical support for the lamp;

Fig. 4 is an enlarged cross-sectional view of the support taken on the line 4--4 of Fig. 3;

Fig. 5 is a, top plan view of a removable internal supporting part showing the spaces between radial projections for the passage of the cooling uid.

Referring now particularly to Fig. 1, main socket member preferably formed of insulating or Plastic material and having a large rey cess II. In the upper part of the recess I I, there is imbeddedl a metal ring I2 having screw threads thereon to which is attach-ed a clamping screw` support 2l of spider cross-section and having radially-extending portions 22. Between the portions 22 are passages 23, Fig. 4,A for conducting Both the inner sleeve and the casing-V III is'a the cooling water along the support 2 I. The bottom of the recess il has a conical formation 24 in which is xed a metal sleeve 25 through which parent tube 21 with the conical portion 24, therey i Tube 21 is` is provided a sleeve 23 of rubber. flared outwardly as indicated at 29 to nicely receive the rubber and to provide a flange' against which the inner end of an internal connecting 4 and passes the passages 23 of the lamp support 29 and the inner sleeve 21. This water on leaving passages 23 surrounds the vapor lamp 35 to cool the same. Cooling fluid leaving the outer end of the sleeve 21 will circulate about the terminal end 39 of the lamp to cool those portions thereof. The cooling iiuid then reverses its direction of iiow and passes between the outer casing and the sleeve 21, space 48, passages 51 inthe connecting'rnember 3l, annular. space 58 to exit tube 49. This path can be traced by the arrows.

'The hose connections Sl and 62 may connect as shownin Fig. 2 with inlet and outlet conduits part 3| may cooperate to secure the 'rubber in sealing engagement with the cooperating` parts. Metal sleeve 25 extends upwardly above the conical portion 24 and prevents rubbergasket 28 from expanding inwardly between arms of the spider so as to hamper the water flow.

This connecting part 3| has a central opening 32 extending throughout its entire length and Which is flared at the bottom as indicated at 33 to fit upon the conical portion 24. The connecting member extends for the full height of the recess and the transparent sleeve 21 is contained within its opening 32.

LThe lamp support 2| has its outer end cut out as indicated at 34, Fig. 3, to receive a lamp 35. This lamp has its lower terminal 36 fitted within the recess 34 oi the support 2| to make tight contact with the support. Surrounding the recess 34 of the support 2| are finger projections or prongs 31 which are adapted to spring slightly as the lamp 35 is pushed into the support.

The lamp 35 has a terminal 38 at its opposite end adapted to be seated in a rubber member 39 carried within the reduced end of atransparent outer casing 4| adapted to cover the lamp and be spaced from the internal transparent sleeve 21.

The connecting Ymember 3| is also of plastic material and has a ledge 42 on which is rested a ring 43 of metal or other material. At the inner periphery of. the ring 43; the ring material is thickened to provide 4a crown 44 for supporting oneend of a rubber sealing ring 45.

The lower end of the outer casing 4| is flared at 46 and rests in the rubber sealing ring 45. In order to provide a good distribution of the rubber ring 45 against the outer wall surface of the flared end 46 and in recess Il and to-make a positive seal, there is provided a pressure ring 41 shaped to force the rubber about the flared. end of the casing 4| and against walls of the main socket IU. The internal diameter of theV outer casing is slightly larger than the connecting member 3| so as to provide a space 48 through which cooling water being returned to an outlet pipe 49 may pass. The ring 41 is forced into the rubber 45 by the clamping screw |3.

The connecting member 3| has radially-ex-- tending projections 55, Fig. 5, spaced circumferentially about its main portion 5E to provide cooling fluid passages 51. Thesepassages 51 communicate with an annular recess 58 from which the cooling pipe 49 leads. The cooling pipe 49 extends through a plastic skirt portion 59. Y

The metal tubes I6 and 49 extend below their skirt portions, and hose connections 6| and 62 t over the tubes I3, 49, and the skirt portions |1, 59.

Water enters the holder through the tube I5.

64 and 65. About the respective conduits 64 and 65are` collar terminals 35 and 31 having the wires 66a and laleading from any electrical source not shown.

.In order to establish electrical connection through the hose connections 5| and E2, there are provided extensible wires 'i9 having fastening clips 1| adapted to be snapped over diametricallyextending terminal pins 12 in the conducting tubes i6, 4S, 64, 65. When the-hose connections 6| and 52 are slid or pulled off from the cooling pipes the fastening clips 1| are exposed and can then readily be detached from the pins i2.

The terminal 38 of the vapor lamp is connected throughV a contact ring'15 and a lead 'extends through space between the outer casing 4| and the sleeve 21, recesses 51 and annular space 58' in the connecting member for -connection'with the upper end of the metal cooling tube 49.

A reector 11 may be fitted by its sleeeve portion i8 tothe holder lil.` l

It-should now be apparent that there has been provided a holder for vapor lampsadapted to be cooled, which is of simpleY construction easily assembled and disassembled and eiiicient in operation.

It will also be apparentl that all the electrical and water connections are established at but one end of the jacket, thereby to provide for an easy mounting of the lamp holder, and that Ythe glass tubes are of simple design and economically pro duced.

The shape of the glass tubes is such as-to permit easy grinding in case extreme accuracy inV mounting the parts is desired. Cooling iiuid need l filtered glass or of other insulating and transparent material. Also, the standard tubes shown maybe replaced with other ones which are longer or of different shape for'use in cases where the light source must be at a considerable distance from the reector casing.

I have described what I believe to be the best embodiments of my invention. I do not wish.

however, to be conned to the embodiments. shown, but what I desire to cover by Letters .l

Patent is set forth in the appended claims.

I claim: Y 1. In combination, a lamp holder having an enlarged recess,` cooling pipes communicatingA respectively with-the recess, a lamp support secured in the bottom of the recess and providing for passages for cooling uid entering the recess .by Way o1? thepipe connected with the bottom thereof, a lamp fitted in the upper end of the lamp support, a transparent sleeve surrounding the lamp support and the lamp having its inner wall spaced therefrom to provide a passage for the ycooling fluid moving through .the support, a connecting member surrounding the transparent sleeve for securing the same to the bottom of the recess, an outer casing surrounding the lam-,p and the inner sleeve and having its wall spaced therefrom to provide a return passage for the cooling fluid, said connecting member having passages for conducting the iiuid from the inner end of the casing to an outlet cooling pipe in the hoi-der, and clamping means for securing the outer casing to the connecting member and to the holder.

2. In combination, a main holder having an enlarged recess therein, inlet and outlet cooling pipes respectively communicating With the recess, a lamp support mounted in the recess and having passage means for conducting cooling fluid therethrough, said recess having a verticallyextending conical portion surrounding a part of the lam-p support, a lamp` mounted on the outer end :of said support, a transparent sleeve surrounding the support and the lamp and having i-ts inner end resting on the 4top of the conical portion, a connecting member cooperating with the inner end of the transparent sleeve for fixing the sleeve to the conical portion, said connecting member further having a tapering recess in its inner Vend adapted to cooperate with the conical portion, an outer casing surrounding .the inner sleeve and lamp secured in the outer end of the recess and against the connecting member, said connecting member having passages therein for receiving cooling fluid leaving the outer casing and conducting the same to an loutlet cooling pipe.

3. In combination a holder having an enlarged recess, cooling pipes communicating respectively with the recess, a lamp support extending upwardly from the bottom` of the recess, a lamp mounted in the lamp suppor-t, a transparent sleeve surrounding the lamp support and lamp for conducting a cooling uid'over the lamp, said transparent sleeve being ared at its inner end, rubbing sealing means surrounding the flared end of .the sleeve, a connecting member surrounding the sleeve and the rubber sealing means and adapted to engage the bottom of the recess, an outer casing surrounding the sleeve and the connecting member and having a bottom flared end, a rubber sealing means surrounding .the bottom Iiared end of the outer casing, clamping screw means surrounding the outer casing and forcing the flared bottom end of the casing inwardly against the connecting member, and passage means in the connecting member for conducting fluid between the outer leasing and .the outlet pipe.

4. In combination, a holder having a large recess, inlet and outlet cooling pipes in the holder, a lamp support mounted in the recess and extending outwardly toward the open end thereof, said lamp support constituting an electrical conductor, a lamp connected to the outer end of the support to receive current therefrom, a trans-- parent sleeve surrounding the lamp and support, a connecting member about the sleeve and seated in the bottom `of the recess, an outer casing surrounding the connecting member, a clamping nut for securing the -outer casing to the -connecting member and to the holder, a Iterminal connection extending from the outer end of the lamp between the casing and the transparent sleeve and Ithrough the connecting member for connecting with one of the cooling pipes, and means for conducting uid between the sleeve and the lamp and ibetween the outer casing and the sleeve and .through the connecting member to the outlet pipe.

5. The invention as dened in claim 4 in which the outer casing has a rubber element for receiving the outer terminal of the vapor lamp, and .a rubber cushioning means between the respec-tive inner ends of the internal transparent sleeve and the outer casing whereby a fragile transparent material of the inner sleeve and the outer casing will have a rubber connection with the holder and -connecting member.

ARISTODEME J. COSMETTO.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,900,109 Hendry Mar. 7, 1933 2,158,215 Bol et a1 May 16, 1939 2,275,739 Dellian et al Mar. 10, 1942 2,295,046 Noel Sept. 8, 1942 2,312,232 Bol Feb. 23, 1943 Certificate of Correction Patent No. 2,445,313. July 2o, 1948.

ARISTODEME J. COSMETTO It is hereby certified that error appears in the printed specification of the above numbered atent requiring correction as follows: Column 5, line 48, claim 3, for the word rub ing read rubber; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 12th day of October, A. D. 1948.

l im] THOMAS F. MURPHY,

Assistant Oommz'ssioner of Patents. 

